Seal Body Lengths and Age

Body length (cm) and age (days) for 9,665 female Northern fur seals (Callorhinus ursinus).

Usage

ShrinkingSeals

Format

A data frame with 9,665 observations on the following 2 variables.

age

age (days)

length

body length (cm)

Source

Trites, A.W. and M.A. Bigg. 1996. Physical growth of northern fur seals: seasonal fluctuations and migratory influences. Journal of Zoology (London) 238: 459-482.

Examples

str(ShrinkingSeals)
#> 'data.frame':	9665 obs. of  2 variables:
#>  $ age   : int  5337 2081 2085 4299 2861 5052 5417 2862 2132 3595 ...
#>  $ length: int  131 123 122 136 122 131 131 135 123 125 ...

plot(ShrinkingSeals, pch = 16, cex = 0.5)

xyplot(length ~ age, ShrinkingSeals, pch=16, alpha=0.65, cex=0.6)